This 1976 lecture by Massimo Vignelli to a group of designers employed by the Federal Government is a treasure trove of insight. Apparently, Vignelli was brought in to proselytize his nearly-religious belief in the grid as a central design philosophy, and walks his audience through some of his most beautifully realized grid systems.Unexpectedly, this page is hosted by the US Geological Survey, which also maintains a small but informative collection of other design resources. There’s some good stuff here, including Philip B. Meggs’s searing critique of NASA’s reversion to its old “meatball” logo.